Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafaddb5a6ef4a3b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-27 17:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d530559ddda9dbd275568c22916606ed SHA-1: cb823368c9e43f2d4d306853b61ad8d861f79c69 SHA-256: cafaddb5a6ef4a3b9aafd1a774dc542dbf9721d9ed1c2d6b84e9f0914a1f35f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the ML classification strongly suggest this PDF is designed to redirect users to malicious sites or download further payloads, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/wix?keyword=topographic+map+worksheets+4th+grade PDF link annotation
    • http://latuha.com/roland_fantom_x6_reviewznnyu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fee72733bcb3.pdfIn PDF document text
    • http://site-shop.xyz/vocabulary_builder_downloaddt6bl.pdfIn PDF document text
    • http://thelait.pro/wubobenitenuralaxafirokovy9aui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409630/normal_5fefadf112c9d.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/9Nheeng/zotisiso.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/elXiaWV/robot_war_gangstar_crime_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/m0smUOu/ralekewevakexanop.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_601f430716575.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/hhegdjb/vekusisodefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406466/normal_6017a67e12399.pdfIn PDF document text
    • http://fapseo.ru/13021565344d7lme.pdfIn PDF document text
    • http://sellforce.ru/74673074898btth4.pdfIn PDF document text
    • http://hookup157.site/fokepofuketilibihye0p.pdfIn PDF document text
    • http://lowadikewafuber.iblogger.org/sukusuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapataxetawot.epizy.com/64949133279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15b83e5-e972-45f1-96fa-f683cd624a74/91720858317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d573ad5c-a392-480c-881d-d018cb72e0f7/when_was_my_sw_revolver_made.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 5648 bytes
SHA-256: 933b2c858487b3221529b18bac9d1b18143230cb140d3d969bd6614d42d1cbb5
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 10904 bytes
SHA-256: f4ce3ddcdc02b67df62406796ea4aeaade2c9cadaa1275cb736692fe9bab489e

Open this report in the interactive analyzer, or submit your own file for analysis.